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Corrosion and Formation of Surface Films on Metals and Alloys
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Corrosion and Formation of Surface Films on Metals and Alloys

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Corrosion".

Deadline for manuscript submissions: 10 June 2024 | Viewed by 1679

Special Issue Editors

Prof. Dr. Herman Potgieter

E-Mail Website
Guest Editor
School of Chemical and Metallurgical Engineering, University of the Witwatersrand, Johannesburg ZA-2050, South Africa
Interests: corrosion; electrochemistry; electrowinning; water treatment
Special Issues, Collections and Topics in MDPI journals
Dr. Michael Oluwatosin Bodunrin

E-Mail Website
Guest Editor
School of Chemical and Metallurgical Engineering, University of the Witwatersrand, Johannesburg 2000, South Africa
Interests: titanium alloys; dental alloys; welding
Special Issues, Collections and Topics in MDPI journals
Dr. David Whitefield

E-Mail Website
Guest Editor Assistant
School of Chemical and Metallurgical Engineering, Unversity of the Witwatersrand, Johannesburg 2050, South Africa
Interests: corrosion; additive manufacturing; WC hard metals

Special Issue Information

Dear Colleagues,

Corrosion is a multifaceted degradation phenomenon with wide-ranging consequences in many industries and environments. The corrosion behavior of materials in corrosive media depends critically on the nature of the passive film and corrosion products formed during the corrosion process. This Special Edition will emphasize these passive films and corrosion products that form during the aqueous media's corrosion process. Mild and stainless steel are popular materials in several industries and applications, and their corrosion behavior is often reported. However, a wide variety of other non-ferrous metals and alloys find application in numerous products and processes. The focus in this Special Edition will be on these different alloys and metals, e.g., titanium, magnesium, and aluminum alloys, copper, brass, and bronze alloys, cermet and metal matrix composites, high-entropy alloys, and any materials and the nature and composition of passive film and corrosion products formed on them during any aqueous corrosion process. Information obtained by any surface analysis technique, or combination thereof, which can provide such information and is utilized as part of the study, can be described.

Prof. Dr. Herman Potgieter
Dr. Michael Oluwatosin Bodunrin
Guest Editors

Dr. David Whitefield
Guest Editor Assistant

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • passive layer
  • corrosion layer composition
  • SEM-EDS
  • XRD
  • XPS
  • Raman spectroscopy
  • corrosion surface
  • corrosion products

Published Papers (2 papers)

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Research

18 pages, 9312 KiB  
Article
Corrosion of an Additively Manufactured Ti6Al4V Alloy in Saline and Acidic Media
by Hugo Mora-Sanchez, Miguel Collado-Vian, Marta Mohedano, Raúl Arrabal and Endzhe Matykina
Materials 2024, 17(3), 712; https://doi.org/10.3390/ma17030712 - 02 Feb 2024
Viewed by 571
Abstract
The present work aims to provide corrosion performance data for an additively manufactured Ti6Al4V alloy in saline and polluted environments. The as-received additively manufactured material underwent heat treatment at 850 °C for 3 h to transform the acicular α’ microstructure into a lamellar [...] Read more.
The present work aims to provide corrosion performance data for an additively manufactured Ti6Al4V alloy in saline and polluted environments. The as-received additively manufactured material underwent heat treatment at 850 °C for 3 h to transform the acicular α’ microstructure into a lamellar α microstructure. Comparative corrosion assessments were conducted between the heat-treated substrates, the as-received condition, and a conventionally mill-annealed alloy. Potentiodynamic polarization experiments were carried out in saline (3.5 wt.% NaCl) and acid aqueous media ((NH4)2SO4 containing Harrison’s solution). The corrosion performance of additively manufactured substrates matched or surpassed that of the conventional alloy in Harrison’s solutions while remaining inferior in saline medium, despite forming a thicker passive film. Overall, the XY plane showed better corrosion performance, particularly after the elimination of the acicular α’ martensite by the applied heat treatment. The results also suggested that the presence of the coarse β phase was beneficial in 3.5 wt.% NaCl solution and detrimental in Harrison’s solutions, more so in acidified and fluorinated conditions. Full article
(This article belongs to the Special Issue Corrosion and Formation of Surface Films on Metals and Alloys)
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15 pages, 3370 KiB  
Article
Effect of Sulfide and Chloride Ions on Pitting Corrosion of Type 316 Austenitic Stainless Steel in Groundwater Conditions Using Response Surface Methodology
by Jin-Seok Yoo, Nguyen Thuy Chung, Yun-Ho Lee, Yong-Won Kim and Jung-Gu Kim
Materials 2024, 17(1), 178; https://doi.org/10.3390/ma17010178 - 28 Dec 2023
Cited by 1 | Viewed by 594
Abstract
This study investigates the corrosion resistance of Type 316 stainless steel as a candidate material for radioactive waste disposal canisters. The viability of stainless steel is examined under groundwater conditions with variations in pH, bisulfide ions (HS−), and chloride ions (Cl [...] Read more.
This study investigates the corrosion resistance of Type 316 stainless steel as a candidate material for radioactive waste disposal canisters. The viability of stainless steel is examined under groundwater conditions with variations in pH, bisulfide ions (HS−), and chloride ions (Cl−) concentrations. Utilizing response surface methodology, correlations between corrosion factors and two crucial response variables, passive film breakdown potential and protection potential, are established. Cyclic potentiodynamic polarization tests and advanced analytical techniques provide detailed insights into the material’s behavior. This research goes beyond, deriving an equation through response surface methodology that elucidates the relationship between the factors and breakdown potential. HS− weakens the passive film and reduces the pitting corrosion resistance of the stainless steel. However, this study highlights the inhibitory effect of HS− on pitting corrosion when Cl− concentrations are below 0.001 M and at equivalent concentrations of HS−. Under these conditions, immediate re-passivation occurs from the destroyed passive film to metal sulfides such as FeS2, MoS2, and MoS3. As a result, no hysteresis loop occurs in the cyclic polarization curve in these conditions. This research contributes to the understanding of Type 316 stainless-steel corrosion behavior, offering implications for the disposal of radioactive waste in geological repositories. Full article
(This article belongs to the Special Issue Corrosion and Formation of Surface Films on Metals and Alloys)
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